<template>
    <div class="cmt-container">
      <h3>发表评论</h3>
      <hr>
      <textarea name=""  placeholder="请输入要bb的内容" v-model="msg"></textarea>
      <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
      <div class="cmt-list">
        <div class="cmt-item" v-for="(item,i) in comments" :key="item.add_time">
          <div class="cmt-title">第{{i+1}}楼用户&nbsp;&nbsp;{{item.user_name}}&nbsp;&nbsp; 发表时间{{item.add_time|dateFormat}}</div>
          <div class="cmt-body">{{item.content=="undefined"?"此用户很懒,什么都没说":item.content}}</div>
        </div>
      </div>
      <mt-button type="primary" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
</template>
           
<script>
import {Toast }from "mint-ui"
export default{
  data(){
    return{
      pageIndex:1,
      comments:[],
      msg:""
    }
  },
  props:["id"],
  methods:{
    getComments(){
      this.$http.get("api/getcomments/"+this.id +"?pageindex="+this.pageIndex)
      .then(result => {
        if (result.body.status === 0) {
          // console.log(result)
          // this.comments = result.body.message;
          // 每当获取新评论数据的时候，不要把老数据清空覆盖，而是应该以老数据，拼接上新数据
          this.comments = this.comments.concat(result.body.message);
        } else {
          Toast("获取评论失败！");
        }
      });
    },
    getMore(){
      this.pageIndex++;
      this.getComments();
    },
    postComment(){
      if(this.msg.trim().length===0){
        
          Toast("品论内容不为空")
      }else{
        // api/postcomment/43
        this.$http.post("api/postcomment/"+this.id,{content:this.msg.trim()}).then(res=>{
          console.log(res);
          if(res.body.status==0){
            //1. 拼接出一个评论对象
            var cmt = {
              user_name: "匿名用户",
              add_time: Date.now(),
              content: this.msg.trim()
            };
            this.comments.unshift(cmt);
            this.msg = "";
          }
        })
      }

    }
  },
  created(){
    this.getComments()
  }
             
}
</script>
<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list{
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-title {
        line-height: 30px;
        background-color: #ccc;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
            
</style>